CONTENTS. . 



Chapter IV. — The Nahun and Sivalik Groups. 



Two groups easily distinguished east of the Sutlej, 101. Previous notices; Her- 

 bert, Cautley, Strackey, Vicary, Greenough, 102. A possible explanation of Caut- 

 ley's section, 104. Necessary separation of an upper group, 105. Section at Nahun 

 106. Key-section at Tib, 108. Explanation, 109. Dun formation, 110. Middle 

 group in eastern region, 112. The north-south steps of main boundary not cross- 

 faults, 115, Sivalik group in eastern region, 117. Changes of composition corres- 

 pond with the present conditions of the surface, 118. Disturbance of Sivalik group, 

 120. Transverse contortion at the great river gorges, 122. Section in the Noon, 

 illustrative of the difficulty in grouping these deposits, 127. Difficulty of classifica- 

 tion in the western region, 131. Peculiar condition of the hills between Kalka and 

 Belaspur, 133. Belasjjur conglomerates different from those of the outer hills, 135. 

 Conjectures upon the Sutlej section, 137. Western continuation of the Sivalik hills, 

 138. Inner ranges west of the Sutlej, 141. 



Chapter V. — Post- Sivalik Deposits. 

 Distinct separation of the plains-deposits, 152. Their relationship to the super- 

 ficial deposits of the Diins, 154. Glacial deposits, 155. Lakes, 157. 



Chapter VI. — General discussion of the structure of the hill ranges. 



Colonel R. Strachey's views on the structure and history of the Himalaya, 160. 

 Observations by Vigne, Thomson, and Hooker, 166. Generalizations now suggested. 

 167. Special conclusions arrived at, 174. 



Chapter VII. — Economic Geology. 



Building-stones. Slates. Lime and cement stones. Gypsum. Salt. Iron. Cop, 

 per. Lead. Gold. Coal. Water. 



Appendix. — On theories of Mountain-formation. 



